package com.sky.service.impl;

import lombok.extern.slf4j.Slf4j;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.EmployeeDTO;
import com.sky.result.PageResult;
import com.sky.service.impl.EmployeeServiceImpl;
import com.github.pagehelper.PageHelper;  // 修改这行
import com.github.pagehelper.Page;        // 添加这行
import org.springframework.beans.BeanUtils; // 修改这行
import java.time.LocalDateTime;           // 修改这行
import com.sky.context.BaseContext;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     */
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setStatus(1);
        employeeMapper.insert(employee);
    }

    @Override
    public void delete(Long id) {
        employeeMapper.deleteById(id);
    }
    @Override
        public void update(EmployeeDTO employeeDTO) {
            log.info("接收到的 DTO 数据：{}", employeeDTO);
            
            Employee employee = new Employee();
            BeanUtils.copyProperties(employeeDTO, employee);
            log.info("复制后的 employee 数据：{}", employee);
            
            if (employee.getId() == null) {
                throw new RuntimeException("员工ID不能为空");
            }
            
            employee.setUpdateTime(LocalDateTime.now());
            employee.setUpdateUser(BaseContext.getCurrentId());
            
            int rows = employeeMapper.update(employee);
            if (rows == 0) {
                throw new RuntimeException("员工不存在或更新失败");
            }
        }
    
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .updateTime(LocalDateTime.now())
                .build();
        employeeMapper.update(employee);
    }
}